Archived 2010-2011 topics: Puerto Rican Nightjar (Caprimulgus noctitherus): downlist to Endangered?

Link to BirdLife species factsheet for Puerto Rican Nightjar

Puerto Rican Nightjar Caprimulgus noctitherus is currently listed as Critically Endangered under criterion B1a+b(i,ii,iii), on the basis that its Extent of Occurrence (EOO) was estimated at less than 100 km2, in which its habitat is severely fragmented, with continuing declines suspected in the species’s EOO, Area of Occupancy (AOO) and area, extent and quality of habitat.

Recently, however, survey work has extended the species’s known range from Ponce through south-central Puerto Rico to Guayama province in the south-east (Vilella and González 2009). Following this new information, the estimated EOO has been re-calculated to be about 290 km2. This suggests that the species should be downlisted to Endangered under criterion B1a+b(i,ii,iii), on the basis that the species has an EOO estimated at less than 5,000 km2, in which its habitat is severely fragmented and continuing declines are suspected in the EOO, AOO and area, extent and/or quality of habitat. Comments are invited on this proposed change.

Updated BirdLife range map for Puerto Rican Nightjar

Vilella, F. J. and González, R. (2009) Geographic distribution of the Puerto Rican Nightjar: A patch occupancy approach. Final Report. USGS Cooperative Fish and Wildlife Research Unit/Department of Wildlife and Fisheries/Mississippi State University.

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One Response to Archived 2010-2011 topics: Puerto Rican Nightjar (Caprimulgus noctitherus): downlist to Endangered?

  1. Para tomar esta decisión hay que tener en cuenta que hay que esperar a ver si el aumento poblacional y de ámbito se sostiene o se estabiliza.
    A pesar de que los resultados del mencionado estudio es una noticia muy positiva hay que tener en cuenta de que esa parte de Puerto Rico es vulnerable a los incendios. Los lugareños tienen la cultura de incendiar los pastos y a veces estos incendios se extienden hasta los bosques. En tiempos de poca lluvia a veces los incendios consumen muchas hectáreas de vegetación.
    Me parece que lo prudente es esperar varios años y asegurar que tales hábitats o lugares estén protegidos antes de tomar cualquier desición.

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